CQ7 battery discharging into car via Zappi during the day
Hi, I'm very new to the Fox system, having just had my install of KH7 inverter and 3 x CQ7 batteries and a total of 19 panels. Having previously had Givenergy inverter and battery I'm very new to this new system. I'm with Octopus Intelligent Go and do smart charging with them. ie. plug the car in during the day using my Zappi charger and let octopus decide when to charge up to the required SOC (90%) etc. I am also on their cheap 2330-0530 rate.
I have just plugged my car in (mid afternoon) where panels are generating, some energy is coming in from the grid AND also some coming in from the battery.
Is there a way to stop the battery from discharging into the car? I really just want to keep the car plugged in and let Octopus sort out the charging. Thanks very much.
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Site Admin
Re: CQ7 battery discharging into car via Zappi during the day
you need to have your charger wired so it's up stream of the fox ct clamp so the fox system doesn't see the charger as load.
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3 x KH Hybird Inverters (Parallel Mode)
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1 x H1 Gen2 WL (Testing, Modbus and API development)
24 x HV2600 (62.4kWh), 2 x EP12, 2 x ECS2900
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Heatpump & Low Carbon Housebuild
Re: CQ7 battery discharging into car via Zappi during the day
This subject comes up far too often.
Did this happen with your old system too, or did you not have a Zappi then?

See: viewtopic.php?t=3272
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Site Admin
Re: CQ7 battery discharging into car via Zappi during the day
Good catch. I've made that post sticky to help future members.
Grumps wrote: Thu Aug 13, 2026 7:59 am This subject comes up far too often.
Did this happen with your old system too, or did you not have a Zappi then?

See: viewtopic.php?t=3272
Community Admin / FoxESS Elite Professional

Image Did I help you? Feel free to leave me a tip
Image Book a zoom meeting for remote consultancy or help
Image Switch to Octopus and earn £50
Image Subscribe to my YouTube channel

3 x KH Hybird Inverters (Parallel Mode)
1 x H1 Gen1 (Solar Mode)
1 x H1 Gen2 WL (Testing, Modbus and API development)
24 x HV2600 (62.4kWh), 2 x EP12, 2 x ECS2900
32 x 490w across 4 arrays

2 x EV's (Tesla & Mercedes) Fox ESS EV Charger & Hypervolt Chargers
Heatpump & Low Carbon Housebuild
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